Bubble machine



FIG. 1 is a front and left perspective view of a bubble machine showingour new design;

FIG. 2 is a rear and right perspective view thereof;

FIG. 3 is a front perspective view thereof;

FIG. 4 is a rear perspective view thereof;

FIG. 5 is a top perspective view thereof;

FIG. 6 is a bottom perspective view thereof;

FIG. 7 is a left side perspective view thereof; and,

FIG. 8 is a right side perspective view thereof.

The broken-line disclosure of elements is understood to representportions of the article in which the design is embodied, but which formno part of the claimed design.

CLAIM The ornamental design for a bubble machine, as shown anddescribed.